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<title>Berkeley DB Reference Guide: Release 3.3: memp_fget, EIO</title>
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<td><b><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></b></td>
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<p align=center><b>Release 3.3: memp_fget, EIO</b></p>
<p>Previous releases of Berkeley DB returned the system error EIO when the
memp_fget function was called to retrieve a page, the page did not
exist, and the <a href="../../api_c/memp_fget.html#DB_MPOOL_CREATE">DB_MPOOL_CREATE</a> flag was not set.  In the 3.3
release, the error <a href="../../api_c/memp_fget.html#DB_PAGE_NOTFOUND">DB_PAGE_NOTFOUND</a> is returned instead, to
allow applications to distinguish between recoverable and
non-recoverable errors.  Applications calling the memp_fget function
and checking for a return of EIO should check for
<a href="../../api_c/memp_fget.html#DB_PAGE_NOTFOUND">DB_PAGE_NOTFOUND</a> instead.</p>
<p>Previous releases of Berkeley DB treated filesystem I/O failure (the most
common of which the filesystem running out of space), as a fatal error,
returning <a href="../../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>.  When a filesystem failure happens in
the 3.3 release Berkeley DB returns the underlying system error (usually EIO),
but can continue to run.  Applications should abort any enclosing
transaction when a recoverable system error occurs in order to recover
from the error.</p>
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<p><font size=1>Copyright (c) 1996,2008 Oracle.  All rights reserved.</font>
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